# Microstrip Impedance From Zo Calculator

Easily calculate microstrip impedance from target impedance (Zo) using our efficient online calculator.

Utilize our electrical engineering calculator to accurately determine the trace width, Capacitance per unit length, Inductance per unit length, DC resistance per unit length, and propagation speed based on the desired target impedance (Zo), trace thickness, dielectric thickness, and relative dielectric constant. Streamline your circuit design and analysis process with this powerful calculator, enabling you to optimize your trace dimensions and achieve the desired electrical characteristics. Enhance your electrical engineering projects and make informed design decisions with our user-friendly electrical engineering calculator. Simplify your calculations and unlock the full potential of your circuit designs.

Trace Width
mm
Trace Thickness
mm
Dielectric Thickness
mm
Relative Dielectric Constant
mm
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4 Number of calculations
w = \left( \frac{{7.48 \cdot h}}{{e(Z_o \cdot \sqrt{{\text{er} + 1.41}}) / 87}} \right) - (1.25 \cdot t) T_{pd} = 3.333 \cdot \sqrt{{(0.475 \cdot \text{er}) + 0.67}} \cdot \text{dimension} C = \frac{{T_{pd}}}{{Z_o}} L = \frac{{T_{pd} \cdot Z_o}}{{1000}} D_c = \frac{{17.2}}{{w \cdot t \cdot \text{dimension}^2}} \cdot 1000

where,

• w = Trace width
• er = Relative Dielectric Constant
• h = Trace Width
• Zo = Single-Ended Microstrip Impedance
• t = Trace Thickness
• Tpd = Propagation Delay
• C = Capacitance
• L = Inductance
• Dc = Resistance
• if the dimension unit is mm then dimension=1
• if the dimension unit is mils then the dimension is 0.0254